Streaming media is booming and everyone is getting onboard. A 2015 report by Cisco predicted that in 2016, 6.1 exabytes of data have been to be consumed on mobile platforms. It was expected to rise to 9.6 exabytes in 2017 and jump to 15.2 exabytes in 2018. Without knowing the precise numbers, it is safe to say the demand and progress will continue.

In the event you’re involved with streaming media, you either know all about video transcoding, otherwise you’re wondering why you keep hearing about it. Should you aren’t positive you want it, that places you in the second camp. An understanding of video transcoding and the right way to do it is critical for any success with streaming video; particularly if it is advisable deliver streaming video to a variety of completely different devices.

What’s Video Transcoding?

Video transcoding, typically called video encoding, is the conversion from one digital encoding format to a different, akin to for film data files. This includes translating all three components of a digital video at the identical time — the file format, the video, and the audio.

This is a vital operate when a target system doesn’t help the present format of your media, or has limited storage capacity that requires a reduced file dimension (think going from WMV to MP4). Additionally it is used to transform incompatible or obsolete data to a greater-supported, read newer, video format.

Why is Transcoding Critical?

Video transcoding is critical if you need your content to achieve more finish users.

For example, you’re getting ready to do a live stream out of your office. It’s a possibility that you just’re capturing webcam audio and video with a browser-based mostly desktop application like Adobe Flash, which generates 1080p H.264 video and Speex audio.

Your show will probably be delivered live to online viewers; nevertheless, an attempt to stream it directly will have problems:

Those viewing without ample bandwidth won’t be able to view the stream — they’ll be watching the ‘buffering’ circle.

With a purpose to render the Speex audio, most individuals will need to watch utilizing Flash Player on a computer. Now you’ve just excluded nearly anybody with slower data speeds, tablets, and mobile phones.

With video transcoding, you can create a set of time-aligned video streams, each with a special bitrate and frame measurement, while converting the Speex audio to AAC audio. This group of streams is internet-pleasant, permitting you reach virtually any screen on the planet.

How is Video Transcoding Performed?

Video begins life in a format distinctive to the camera or program used to seize your images and sounds. This is typically not the format needed to deliver the video on-line or play it from one other device. Video transcoding is used to change the original format into one allowing the video and audio to play properly on a person’s devices — be they laptop, tablet, smartphone, or tv.

Video encoding, or video transcoding, entails a two-step process. First, the unique file is decoded to an uncompressed format. Second, this uncompressed format is then encoded into the goal format.

What are Codecs and File Types in Video Transcoding?

When talking about video transcoding, we check with file codecs, file types, and something called codecs.

Video format specifies how video and audio have been mixed and tells playback units the way to play the files.

Video and audio codec formats check with the applied sciences used to each create and play back the digital video and audio.

Examples of file types are MPEG-4 (MP4), Quicktime (MOV), and Flash Video (FLV). The key variable in most cases is the streaming platform you use. Always check what formats and codecs are supported by the platform you wish to use, and whether or not your video file have to be transformed to a supported format.

DaCast, for example, requires an MPEG-4 (MP4) file format with an H.264 video codec. Windows Media Video (WMV) files are Advanced Systems Format (.asf) files that embrace audio, video, or each compressed with Windows Media Audio (WMA) and Windows Media Video (WMV) codecs.

MP4 video provides better quality and compression over WMV, permitting you to store better quality video for a similar file size. A very good video transcoding program will likely be able to transform multiple file codecs and codecs.

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